Ballpark Food—Do’s and Dont’s

Craving popcorn or Cracker Jacks? Opt for plain, unsalted, in-shell peanuts instead, says Chicago dietitian Amari Cheffer, M.S., R.D., LDN. They've got heart-healthy monounsaturated fats, Vitamin E and magnesium—and the act of cracking the shell makes you work a little harder to enjoy them. The catch: A typical eight-ounce bag is much larger than one serving (it can have over 800 calories total), so don't eat more than a quarter of it yourself.